Typewriting machine



B. C. STICKNEY TY-PEWRITING MACHINE Sept. 21 1926.

3 Sheets-Sheet 1 Filed June 24, 1922 //7 van for Sept. 21 1926.1,600,371

B. c. STICKNEY TYPEWRITING MACHINE Filed June 24, 1922 3 Sheets-Sheet 2Sept. 21 1926.

B. C. STICKNEY TYPEWRITING MACHINE 3 Sheets-Sheet 5 Filed June 24, 1922I lnvenfon'.

Patented Sept. 21, 1926.

UNITED STATES 1,600,371 PATENT OFFICE.

BURNHAM c. STICKNEY, or ELIZABETH, NEW EassY, Assmnon TO unnnawoon'rYrnwnrrnR COMPANY, or NEW YORK, N. Y., A CORPORATION or DELAWARE.

TYIPEWRITING MACHINE.

Application filed June 24, 1922. Serial No. 570,565.

This invention relates to front-strike typebar typewriting machineshaving a plurality of case-shifts, especially those having four-typetype-bars.

An object of the invention is to produce a machine which is simple inconstruction, effective in operation and inexpensive to manufacture.Another object of the invention is to produce a machine capable of alarge variet of uses, and having other advantages. ne .of the objects isto provide for quickly removing as a unit the entiretype-action,including the,types and type-keys, together with theshift-keys,and replacing the removed unit with another unit, thetype-action of which may include a different set of types, and whichalso may be otherwise modified, if desired.

According to the present invention, the platen is. non-shiftable and thetype-bar segment is shiftable from a normal position to. three differentcase-shift positions. The shifting of the type-bar segment isaccomplished by means of three independently-operable shift-keys. Thesegment is capable of occupying two extreme positions and twointermediate positions, movable stops controlled by.the'shift-keysbeingprovided for determining the intermediate positions. More particularly,one of the keys shifts the segment from a normal intermediate positionthrough a single space to an extreme position, another key shifts thesegment from its normal position in the opposite direction through onespace to another intermediate posit-ion; and the third key shifts thesegment from normal position through adouble space to an extreme orfinal position. Key-controlled movable stops determinethe normalposition and the other intermediate position of the segment.

According to another feature ofthe invention, the entire type-action,including the type-bars and key-levers,'also the shiftable segment,shift-levers, and stop mechanism for the segment, are all mounted upon aremovable subsidiary frame, which is detachably mounted in the mainframework of the machine. This arrangement is such that the subsidiaryframe andall the parts carried thereby may be readily assembled as aunitand attached to or detached from the main framework. Anothersubsidiary frame carrying other corresponding or different partsandmechanisms may be substituted for the one removed.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a substantially central frontto-rear' vertical section of atypewriting machine embodying the present invention, with the variousparts in their normal positions, for typing with the second type fromthe top in the series of four typesv on each type-bar. p

Figure 2 is atransverse vertical section, with parts omitted, thesection being taken at the front of the platen and type-bar segment andat the rear of the types and keyboard, and substantially at the offsetline 22 of Figure 1.

Figure 3 is a partial plan view forwardly of the. platen, and shows themounting of the vibrating ribbon-guide.

Figure 4 is a sectional view, on a reduced scale, similar to Figure 1,showing the first shift-key and means operated thereby for shifting thetype-bar segment downwardly, but showing the segment at its normalposition, similarly to Figure 1. I

Figure 5 is a similar View, but shows the segment. shifted down by meansof the first shift-key, to bring into. use the first or uppermost. typein the series, the second and third shift-keys being shown at normalpositions.

Figurefi is a similar view, showing the segment shifted up to itsintermediate caseshift position by means of the second shiftkey, tobring into use the third type the top in the series.

Figure 7 is a similar view, showing the segment shifted up from normalposition throughtwo case-shift spaces by means of the third shift-key,thereby to bring into use the lowermost or final type in the series.

The typewriting machine of the present invention is an improvement uponthe standard Underwood typewriting machine, and retains manyadvantageous features thereof. In the typewriting machine shown in thedrawings as one embodiment of the invention, the platen 1 isnon-shiftable and is journaled by means of its axle 2 directly upon aplaten-carriage 3 which is mounted forletter-feed or reverse movementupon a main frame 4 of the machine At its rear the carriage 3 is mountedto from travel on a rear rail 5 on the main frame 4. The main frame 4comprises a front cross-bar 6, provided along its rear side with a shelf7, forming-a front rail on which runs a carriage-roller 8, journaled ina housing 9, carried by a front bar of the platen-carriage 3. The frontcrossbar (i and the front carriage-bar 10 are sufliciently elevated toclear the extended four-type typebars, but are below the line of vision,so as to render the printing line 'on the platen visible by the typist.Certain features in the construction and arrangement of the frontframe-bar 6 and front carriagebar 10 and associated-parts maybe the sameare disclosed-in my earlier co-pending application, Serial No. 568,691,filed June 16, 1922.

. The carriage 3 may be drawnalong'in its letter-feeding direction ofmovement by nie ansof a usual spring-barrel (not shown), under thecontrol of substantially the'usual Underwood escapement -mechanism,which is mountediupon an upstanding bracket 11, secured upon the mainframe 4, so as to form virtually apart thereof. The escapement mechanismcomprises a dog-rocker 12, pivoted at 13 upon the bracket 11, and havinga downwardly-extending arm 14 by which the dog rocker 12 is operated, bymeans hereinafter described. The dogroclrer 12 carries fixed and loosedogs 15 and 16,to engage a ratchet-wheel 17, mounted on the upper end ofthe'bracket 11 and connected to a pinion 18, which engages with asuitable rack (not shown), carried by the platen-carriage 3. r

The ribbon-vibrator, which is also mounted upon the main frame 4,includes a bellcrank-lever '19, :pivoted at upon a forwardlyextendingarm of the bracket 11. T he ribbon-vibrating bell-crank lever l9 has adownwardly-extending arm 21 by which it is operated, by meanshereinafter described. It .also has a forwardly-extending arm-22,:pivoted at 23 to the lower end of a vertically-vibrating ribbon-guide24, which at its upper end is provided with eye-formi wingportions25toguide a usual ribbo (not shown), and to cause the ribbon to cover anduncover the printing point on the platen as'the ribbon-guide vibrates.The

ribbon-guide 24 is guided'on the mainframe softhe machine by means ofrearwardly inwardly turned hook-portions 26 (Alix formed thereon, toengage in'groov'es formed in the sldes of a 'guide bloc'k 27, securedupon a tra-n verse b ari28, whichat its ends issecured to the side wallsof the main fra 1194,?1'5 shown in Figures 1 and 3. Since. theribbon-vibrator, comprising the bellcranlr lever 19 and the vibratingribbon- 1116.024,isanounted upo'n the'main frame 4, and since theplat-e111 is non-shiftable, the

necessity of providing means for shifting the ribbon-vibrator isavoided.

According to the present invention, a removable subsidiary frame 29 isprovided and is detachably mounted in the main frame '4 by means'ofscrews 30, two'at each side of the'n'iach-ine, which pass through theside walls of the main frame 4, near the bottom there0f,-and enter thelower part of the subsidiary frame 29. By removing the screws 30, thesubsidiary frame 29, together with all'the parts and mechanisms carriedthereby, to be hereinafter described, may be withdrawn from the mainframe 4 at the bottom thereof. Thatmay then be replaced by an othersubsidiary frame which may carry either similar or modified mechanisms,and which alsomay carry adifferent set of types, f(1)r typing in anotherlanguage, for exampie.

According to the 'presentinvention, a segment-frame is -mounted in thesubsidiary frame 29 for up-and-down case-shift move ments from normalposition to three different case-shift positions. In the machine shownin the drawings, the segment-frame comprises a type-bar segment31,secured by means of screws 32 'toan upper cross-bar 33,provided at itsends with depending legs 34, which are connected together near theirlower ends by means of a lower transverse baror bridge 35. A usualtype-guide 36 is carried by the segment 31 at the front of the vibratingribbon-guide 24, but, in carrying out the present invention, neither thetyj ieguide 36 nor any part of the segmentframe 31 has any mechanicalconnection with the vibrating ribbon-guide 24.

The means for guiding the segment-frame, including the type bar segment31, will be next described. A transverse rock-shaftBT is journ'aled inthe upper and rear part of the subsidiaryframe 29 and at its ends hasfixed thereon forwardly-extending arms 38 which normally are inclinedslightly clownwardly. At their forward ends these arms 38 are pivotedupon 'studs39 which project from the outer sides of thesegment-framelegs 34 nearthe middle thereof, the rockshaft 37 compellingthe arms 38 to swing together as a unit and forming therewith a rockingframe. A rock-arm 40 has a fulcrum-pivot at 41 upon the rear and lowerpa'rtof the subsidiary frame 29, and is of the same length as, andextends forwardly in parallel relation to, the rock-arms 38. Therock-arm40 at its forward end is pivoted at 42'to a'lug 43 whichprojects down from the middle of the lower cross-bar or bridge 35 ofthe'segment-frame. The segment-frame in its case-shift movements mayswing freely up and down upon the rockarms 38 and 40, no other guidingmeans bemg 1 required.

The type-bar segment 31 is provided with.

radial guide-slots 44, in which are pivoted, upon an arcuatefulcrumewire 45, type-bars 46, to, partake of the case-shift movementsofthe segment 31, the number of type-bars i6 in the set being aboutequal to those cmmonly employed in the standard Underwood or othersingle-shift typewriting machine. Each type-bar it carries anextendingtypeblock 47, having-four types, 48, 49, 501 and 51, arranged ina'series thereon and numbered from the uppermost downwardly, forconvenience of description. In the typewriting machine shown in thedrawings, normally, or without case-shifting, the second type 19 in theseries will strike at the printingpoint upon the front of the platen 1,as indicated iniFigure 1 by the arcuate brokenline'52, and as shownin'Figure 1 by the upraised type-head 4t? the shiftable segment 31 thenhaving. a corresponding normal intermediate position.

In orderto print by means of the first or uppermost type as in theseries, the type bar segment 31 is shifted downwardly to its lowermostor final case-shift position, shown in Figure 5; to printby means ofthethird type in the series, the segment 31 is shifted upwardly from itsnormal position to an intermediate case-shift position, shown in'Figure6; while to'print by means of the last or lowermost type 51 in theseries, the segment 31 is shifted upwardly from its normal intermediateposition through'two caseshift spaces or distances to its uppermost orfinal case-shift position, shown in Figure 7. According-to one way ofcarrying out the invention, it'may be desirable to have the second type49 print the small letters of the alphabet, to have the first type L8print the capital letters, and to have the remaining two or'lower types50 and 51 print miscel laneous characters, such as figures and variouscommonly-used arbitrary symbols and signs. It is understood, however,that the invention is not limited to the above-noted particulararrangement of the types nor is it limited to the particularcase-shifting arrangement above mentioned.- other hand, otherarrangements may be effected according to any particular requirementsordemands, depending upon the lan guage to be written, or upon otherrequirements, as-the case maybe. A-t'yperest 58 is provided for thetype-blocks 17, and supported upon the segment-frame to shift therewithby means off0rwardly-cxtending bars or arms 5%, of which one is shown inFigure 1. 1

j The segment-frame, including the typebar segment 31, is automaticallyreturnable from any of its case-shift positions to its normalintermediate position. It is automatically returned by gravity from itsuppermost and from its On the v intermediate casc-- shift positions toits normal position. It is automatically returned to 1ts normalintermediate position from its lower TCZSG-SlllIt position byspring-means, This con'iprises a spring 55, at each side of the machine,acting between the subsidiaryframe .29 and a lifting arm or lever 56,fulcruined at 5'? upon the subsidiary frame, the forward ends of thelevers 56 engaging beneath raised end-portions 58 of the bridge-bar 35,to the main or middle portion of which the endportions 58 are connectedby means ofshort upright portions 59, as shown in Figure 2. Eachsegment-lifting lever at 56 is provided with a tail 60 to abut against astop-pin 61' on the subsidiary frame 29, so as to render the spring 55ineffective when the segment frame has reached its normal position.

The-means for case-shifting the segmentframe from its normalintermediate position to any of its three case-shift positions includesa transverse rock-shaft 62, journaled in the lower part of thesubsidiary frame 29' forwardly of the segment-frame, and having fixedupon its ends rearwardly-extending rock-arms '63. The arms 63 are provided with slotted or forked ends to engage studs 64 carried by lugs 65which extend downwardly from the lower ends of the segment-frame-legs34, so that by rocking the rock-shaft 62 in one direction or reversely,the segment-frame will be correspondingly lowered or raised.

In order to shift the segment-frame downwardly from its normalintermediate position at which printing isdone by means of the second orsmall-letter types 49, toa finalcase-shift position to print by means ofthe uppermost or capital-letter types 48, as shown in Figure 5 by theupraised typeheadd'f', a first shift-key- '66 is provided. This iscarried by a first shift-lever 67, located at the right side of themachine and 'pivoted upon a fulcrum-rod 68 carried by aslottedtransverse bar 69 which forms an upper rear tie-bar for the subsidiaryframe 29 at the rear of the lower part of the segment 31.

WVhen the shi'ft-key 66 is de-" pressed, a downwardly-projecting lug 70on' the shift-lever 67,-after traversing an intervening space providedfor purposes which will hereinafter appear, is brought into engagementwith a laterally-projecting lug 71 upon theforward end of a shortintermediate lever 72 of the first order. The lever 7 2- is fulcrumedupon a stud 73 projecting inwardly from the adjacent side Wall of'the'sub'sidiary frame 29. The continued downward movement of theshift-key 66raises a pin 'M-carried by the forward end of theintermediate lever 72. The pin 74 engages in a slot formed in theforward end of a short forward1y eXtending-' rock arm or lever 75 fixeduponthe rock-shaft 62, to rock the rock-shaft 62in a clockwise 1 if I) ilu . lengths as to impart the correct downward throw to thesegment-frame to shift the latter through a single case-shiftSP2tCe,"\Vlic;ll the shift-key 66 is depressed.

Inasmuch asit is-occasionally desired to write-oneor more words, or oneor more lines, in capital letters, -a latch or locking device isprovided for holding down the first shift-lever67. A latch-lever 77,having at its lower-end a hook 7 8. andat its upper end a finger-piece79, is pivoted at upon'the shift-lever 67. A slotted comb 81, having anupper bar 82, whichforms a stop for the shift-lever67, as wellasforthe-other shiftlevers and key-levers, is carried at the front of thesubsidiary frame 29. At its lower margin this comb 81 carries a forwardly-projecting member 83, which 'forms a catch or 'keeper for thehook 78, with which, as is clearly shown in Figure 5,'the hook normallydoes not engage, the shiftkey 66 thereby being normally left free'torise :after each actuation. When it is desired to lock theshift-lever'67 down, the fi11gerpiece79 of thelatch lever 77 is drawnrearwardly, to'engage'the hook 7 8 with the latch or :keeper .83; and,obviously, by a reverse operation, the hook 78 maybe disengaged whendesired. The disengaging movement of the latch 77 may be limited by asmall stud 84 on the shift-lever '67, and preferably a light spring 85is provided for maintaining the latch 77 in its "disengaged position.

For-shifting the type-bar segment 31 upwardly from itsnormal position toits intermediate case-shift position, to print by means of the thirdtype 50 in the series, a second shift-key 86, Figures land 6, isprovidedupon'a second shift-lever 87 located at the left side of the machine,Figure 2, and pivoted upon the fulcrum-rod 68. When the second shift-key'86 isdepress'ed, during the initial :part of its movement, lostmotion,'the purposes of which will hereinafter ap ear, will be taken upbetween a downward y-projecting lug 88 on the shift lever 87 and alaterally-projectinglug 89 upon the forward end of a lever-arm '90 fixedupon the segment-shifting rock-shaft 62. Further depression of theshift-key86 will rock the rock-shaft 62 in a counterclockwisedirection,as viewed in Figures 1 .6 and 7.

and 6. It will thereby lift the segmentframe'by means of the rock-arms63 from its normal position, shown in Figures 1 and 4-,

through a single case-shift space or distance to itsintermediatecase-shift position, shown in Figure 6, for printing bymeans of the third type 50, by the upraised type-head '47. The lever-arm90 is made of the :proper length to impart the correctcase-shift'movement to the segment-frame when the shiftkey 86 isoperated. When the shift-key 86 is released, the-shiftdever 87 will beraised by its spring 91 to'its normal position, at which it will bestoppedbythe comb bar 82.

For shifting thetype-bar segment 31 upwardly from its normal :position,shown in Figure l,throughtwo case shift spaces or distances to its upperfinal case-shift position, to print by =means of the flOWBIIIlOSt types51, as shown by the-upraised type-head 47 in Figure '7, a-thirdshift-key 92 is .provided upon a third shift-lever 98, pivoted upon-thefulcrum-rod 68. After taking up the intervening lost motion provided forpurposes which will hereinafter appear, a downwardlyprojectingilug 94onthe third shiftlev'er 93 comes into engagement with alaterally-projecting lug 95 provided upon, the forward end of a leverarm 96 fixed on the segment=shifting rock-shaft 62. "Furtherdownwardmovement of the shift-key 92will then rock the rock-shaft 62 inavcounterclockwise direction, as viewed in Figures 1 and 7, and willaccordingly shift the segment-frame upwardly by means of therockarms 63on the rock-shaft 62. The leverarm 96 is made of the proper-length, sothat case-shift movement will be imparted to the segment 81 through twocase-shift spaces, this lever-arm 96 for the third shift-lever 93 beingconsiderably shorter than the corresponding lever-arm90 for the secondshiftlever 87, as will beevident'by an inspection of Figure l and by acomparison of Figures hen the third shift-key 92 is released, av spring97 will raise the shiftlever 98 to its normal, position against thecomb-bar 82. 7

By reason of the relative locations and arrangement of, and spacin orlost motion provided between, the shiftlever lugs 70, 88 and 94c and therespective lever-arm-lugs 71, 89 and 95 operated thereby, when the firstshift-key 66 is depressed the lever-arm lugs 89 and 95 will rise clearof and to the rear of the lugs '88 and-94'carried by "the second andthird shift-levers, as is shown in dotted lines in Figure 5. Similarly,when the second shift-key 86 or the third shiftkey 92 is depressed, thelever-arm lug '71 will rise at the rear of and clear of the "firstshift-lever lug 70, as will be seen from Figure 4:. v

"Preferably means are provided to relieve the second and third shiftik'eys 86 andy92 of a portion of the weight of the segmentframe, and forthis purpose a counterbalance spring 98 is arranged to act'upon thesegment-frame-shitting rock-shaft 62, the spring 98' having a tendencyto rotate the rock-shaft 62 in a counterclockwisedirection, as viewed inFigures 1, 6 and 7. r

A shiit-key-controlled stop mechanism forthe shiftable segment-frame ismounted tween the end walls of the main frame 4 and the end walls of thesubsidiary frame 29 nearly to the top of the segment-frame in its normalor unshifted position. In the illustrated embodiment of the invention,the segment-frame-stops are integrally formed upon the upper endportions of the plates 100 and thereby move as a unit therewith.

' Upper and 'lower stop-shoulders-101 and 102 have spaced overlappingportions which normally engage above and below an out-.

wardly-projecting pin orstud 103 carried by an ear or lug 10 1 whichprojects rearwardly from the adjacent segment-frame- ,leg 34. Theshiftable segment-frame, ineluding the type-bar'segment 31, is therebynormally locked at its normal position against movement either upwardlyor downwardly, but, by moving the stop-carrying members or'plates 100rearwardly from their normal position, the segmentframe may be shifteddownwardly, and, by moving these plates forwardly from-their normalposition, the segment-frame may be shifted upwardly. When thesegment-frame returns from its lower casesh1f t position it will bepositively stopped at its normal position .by'the pin 103 abuttingagainst the non-overlapping or forward portions of the upperstop-shoulders 101. Similarly when the shittable segment frame returnsfrom either of its upper case-shiftpositions it will be'positivelystopped at its normal position by the'pins 103 abutting against the nearor non-overlapping portions of the lower stopshoulders 102. Theoverlapped shoulders 101 and 102 form a combined stopping de vice andnormally efiective locking device.

for the segment-frame.

For positively stopping the segmentframe when it is shifted upwardly bythe secOndshitt-key 86, the stop-pin 103 will abut against anintermediate stop-shoulder 105, located'upon the plate-100 at the ofandat a proper distance above the upper locking-shoulder 101 when thestop-carrytending lever-arms 109, each of which is ing plate 100 ismoved forward sufficiently to free the pin 103 from the upper lockingshoulder 101.; The lower case-shift position of the segment-frame, whichis a final case-shift position, is positively determined when the thesegment-frame is shifted downwardly by means of the first shift-key 66,by the pin 103 abutting against a lowermost stop-shoulder 106 formedupon the plate 100. The stop-shoulder 106 is at the front of the plate!100 below the lower locking shoulder 102, the 'plate 100 being movedrearwardly to free the pin 103-from the lower locking shoulder 102. Theshiftable segment-frame is positively stopped at its upper case-shiftposition, to whichit is shiftable by means of the third shift-key 92, bythe stop-pin 103 abutting against an uppermost stop-shoulder 107. Thisstop shoulderis provided at a proper distance above and at the rear ofthe intermediate ease-shift stop-shoulder 1'05,the stop-carrying plates100 being rocked forward a suiiicient distance so that both the upperlocking shoulder 101' and the intermediate caseshift stop-shoulder'105will clear the pin 103 as the segment-frame moves to its upper finalcase-shift position. I

- For causing the stop-carrying plates 100' to be rocked eitherbackwardly ortorwardly, to render the different above-describedstop-shoulders effective, as may be "desired, a shitt-key-controlledtransverse rock-shaft 108 is provided. This rock-shaft is locked at thefront of the segment-frame and ju t: above the shitt-levers,"isjournaled in the end walls of the subsidiary frame 29, and has fixedupon its outwardly-projecting en-fs downwardly and slightly rearwardlyb5;-

connected to the corresponding stop-carrying plate 100 by means ofan'upwardly-iu clined link 110.

The stop-carrying plates 100 are normally urged rearwardly by meansof'springs 111. During the initial part of the dow1iward movement of thefirst shift-lever 67 and before its lug 70 com'esinto contact with theintermediate lever-lug 71 for shifting the segment-frame downwardly, {as

hereinhe'fore described, a cam 112 on the shift-lever 67 v is actuated.This cam will permit a limited amount of forward and downward'movementof a pin or cam-'follower113 carried by an upwardly and forwardlyprojecting lever-arm 11 1 fixed upon the stop-controlling rock-shaft108. Springs 111 will'be permitted to move the stop-carrying plates 100rearwardly from their'n'ormal positions, shown in Figures 1 and 1,,until their lower lockings'houlders- 102 'dis-f engage the pins 103carried by the segment frame. The further downward movement of theshift-lever 67 will then shift the I ment frame downwardly, ashereinbeforedescribed, until.- it is. positively stopped by the pins 103abuttin against the lowermost the sprin s 55.1mm it is Jositivel i stoJed;

by. the pins. 103 abutting against the fori wardoruon-overlappingportions-of theup- "locking shoulders 101; at the normal pon of thesegment-frame. The further 1 sing; ofthe shift-lever 67 will force thefollower-pin 113; rearwardly, thereby, --'-th i 1gh the connections.hereinbefore desed, n1ovingthe stop-carrying plates 100 forwardly totheir normal positions so thatpins 103 on the segment-frame'are betweenthe overlapping, portions of the opposed '1 stop-shouldersllll anjd;102,as shownin Figures 1 and 4, thereby to lock the segmentframe at; itsnormal position.

During the initial part of thedownward movement of the secondshift-lever .87, a f "cam 115there0n acts upon a pinor camfollower."116,.carried by a second leverarm 117. fixed upon. the stop-controll ngrock-shaft 108 to rotate the latterin a clockwise direction, as. viewedin Figures 1 and'6, Thereby, through the connections hereinbeforedescribed, the stop-carrying plates. 100. are moved,- agai.nst thetension of their springs 111, forwardly from their normalpositions,shownin Figure fl. This distanceiofz movement is such that the upperlocking shoulders 101 are moved clear of the pins 103 on V thesegment-frame, whereupon the further downward movement. of theShlft-IlGVQF 86 will shift the segmentrframe upwardly, as hereinbeforedescribed, from its normal position, until it is positively stopped bythe pins 103- abutting against the intermediate stop-shoulders 1.05 atthe intermediate caseshift position of the segment-frame, as shown inFigure 6. When the second shiftkey 86 is released and the shift-lever 87rises, first; the segment-frame will herestored by gravity to its normalposition, where it; will be positively stopped by the pins 103 abuttingagainst the non-overlapping portions'ofthe lower locking shoulders 102.The release of the cam-follower 116 by the shift-lever cam 115 willenable the spring 111 to move the stop-carrying plates 100 rearwardly.'This will restore them to theirnormal positions, where they will-bestopp'edby reason of'the cam-follower-pin 113' coming into engagementwith the cam 112' carried by the first shift-lever 67.

During the initial part of the downward movement of the thirdshift-lever 93, a cam 118provided thereon acts upon a cam-fol- I lower119 carrieclby the lever-arm 117 fixed upon the stop-cont rollingrock-shaft 108 to rock this shaft in aclockwise direction,as

intermediate stop-shoulders 105.,

viewed in. Eigures 1 and'7,1to.a greater -'extent than it was rocked bythesecond shif lever cam 115, Thereby, through the con.-. nectionshereinbefore described, the; stop-- carrying plates 100 are'moved;forwardly, against the tension of their springs 111, to an extent whichwillnot; only, freethe pins 103 fronrthe upper locking shoulders 101,but which also will clear these pins offthe Further downward movement ofthe third shift-lever 87 Will shift thesegmentrfraine. upwardly,

as hereinbefore described, fro ngits normal position, shown in Figure 1,through two; case-shift; spaces or distanceanntil.it; is pos-. itivelystopped; at; its. uppermost case-shift; position by the. pins 103abutting against the uppermost stop-shoulders 107, as shown in Figure 7.Upon the release of the third shift-key 92 and the rising of the shift-'lever, 93, the segment framewill-beautomatically restoredby gravity toits; normal position, where it will, be positively stoppedv by the pins103 abutting against the rear portions of the lowerlocking shoulders 105The continued: upward movement of the shift-lever 93 willthencausethecam 118 to release the-follower-pin 1'19. thereby enabling the springs111- to move the stopcarrying plates 1 00 rearwardly until theyarerestored to their normal. positions 'with the followerpins 11 3 abuttingagainst the cam 112" onthe first shift-lev er -67.'

The type-action shown as embodiedin the machine of the presentinvent-io11.;has -features in common with the corresponding; structuredisclosed in, the aforesaid earlier application, and, in thepresentinvention, is mounted upon the detachable;subsidiaryframe 29 toberemovcd therewitlnfrom the. main frame4andf-rom thepa-rts ofthemachine or mechanisms carried-thereby. Up-v standing sub-levers 1210fthe firstorder are pivoted in guide-slots 122 in the segmentframe-bridge35, upona. fulcrum-rod 123 carried by the segmenteframe-bridge 35, whichby reason of the 1 ditfirentlengths of the subslevers, is bowed orcurveddown? wardlythroughout its middle portion, the elevatedend-portions 58 thereof providing spacefor the shift-levers-67, 8'7 and93. The upper ends of the sub levers 121 carry pins 12 which work incurved slots-125provided in the type-bars 4.6. Downwardly-extendingportions 126 of key-levers 127, carrying typekeys 128, are pivoted withthe shift-levers iii segment-31 and sub-lever-carrying bridge 35. T hekey-levers 127 are raised tonormal position against the comb-bar 82 bymeans of springs 130.

It is to be noted in this connection that the entire type-action,including the key-levers 127, operating links 129, sub-levers 121 andtype-bars 46, as well as the segment-frame and thehereinbefore-described guiding means therefor, are mounted upon, so asto be removable with, the detachable subsidiary frame 29. v

The apparatus for operating the escapeinent mechanism has features incommon v-sith the corresponding structure disclosed in the aforesaidprior application, and is mounted on the main frame 4. Anescapemeut-operating rock-shaft 131, journaled in the end walls of themain frame 4, carries near its middle, a short upstanding leverarm 132,which engages at the rear the downwardly-extending dog-rockerarm 14;Adjacent its ends the rock-shaft 131 has fixed thereon a pair ofdownwardly and forwardly extending bail-arms 133, which, at

their lowerends, carry'a universal bar 134 operable by means of lugs 135provided upon the rear edges of the downwardly-extend ingkey-lever-portions 126. The operating lugs 135 are normally out ofcontact with the universal bar 134, asshownin'Figure .1, so that thedogrocker 12 will not be operated until near the end of akeylever-stroke. A spring 136 returns the universal b'ar1-34 to normalposition with the upstanding arm against a stop-lug 137 provided on thebracket 11. I i

The mechanism for operating the hereinhefore-described ribbon-vibratoris mounted on the main frame 4 and has'features in common with thecorresponding structure disclosed in the aforesaid prior application. Aroclrshaft 138, journaled at its ends in the side walls of the mainframe 4,- carries near its middle a short upstanding leverarm 139provided with a pin 140 which enin a radial slot formed in the'lower endof the downwardly extendingarm 21 of the bell-cranlolever 19. Adjacentits ends the roclnshaft 138has fixed thereon apair ofdownwardlyeextending bail-arms which at their lower ends, carry auniversal bar 142 to be operated by rearwardly-projecting lugs 143provided upon the down-= wardly-extending portions 126 of the keyleversabove the escapement-operating lugs 135. A. restoring'spring 144isprovided for the ribbon-vibrating universal bar 142;

The escapement-mechanism operatinguniversal bar 134 and theribbon-vibrating universal, bar 142 may swing freely upon theirrespective bail-arms 133 and 141 between the side walls of thedetachable subsidiary framePQ; This is arranged so that the lat -termay-be readily 1 withdrawn from' the rward ends of spacing levers 146which the of substantially the same form as l(G:/-l8VG17S 127 and may bepivoted there- 66 on the detachable subsidiary e-loclring bail-rod 147,which is noriree from, but is engageableiu the usual v' v, with hoo s143 on the keylcvers 1" is carried at its ends upon the upstandingbail-arms 149 which at their lower ends are pivoted at 150 upon the sidewalls of the main frame 4 adjacent the bottom thereof. When thesubsidiary frame 29 is det ched froin'the main franio 4, it can bereadily seen from Figures 1 and that the subsidiary frame 29 and key-lcsers 12? mayfreely move downwardly array from the line-locking hail-rod1 en the bail net. arms 149 and their pivots 1 (X V Besides its uppertic-liar 6. the frame 29 hasa rear lower tie-bar by means of a lug 152,carries the iulcrun'i-' pivot 41 for the segment-frame-guiding rock-arm40. .lhe subsidiary frame also has a front lowerframe-bar or tie-bar 153to which the return springs 130 for the keylevers 127 are shown asconnected.

lVhcn the subsidiary frame 29 is detached and removedfrom the rest ofthemachine, in the manner hereinbefore described, it w ll carry with itthe entiretype-action includ ing the'typediai's 46 and type-keys 123,and will also carry with it the three shift-keys 66, 86 and 92, togetherwith the shift-keycontrolled stop mechanism for the shiftablesegmentframe, and the spacekey 145. This will leave upon the main framethe platen 1, the platen-carriage 3, the carriagefeeding escapementmechanism and the operating mechanism therefor, including the universalbar 134, the ribbon-vibrator-and the operating mechanism therefor,including the universal bar 142 and the line-locking bail-rod 147. Whenthe subsidiary-frame 29, together with the parts carried thereby, isthus detached and removed from the main frame 4,

Variations may be resorted to within the i from one type to anotherscope. of the invention, and portionsof' the improvement-s may be used.without O hers. l

Having thus described my invention, I claim:

1. In a front-strike typewriting machine, in combination, a platen, atype-bar segment, a set of type-bars pivoted on the segment and eachhaving a plurality of types arranged in a series,longitudinallythereon,said platen and segment being relatively shittable members, and acase-shift mechanism including a first shift-key for shifting theshittable member from. a normal intermediate position in. one directionthrough a single case-shift space ordistance, a second shift-key forshifting said shiftable member from a normal intermediate positionthrough a single case-shitt space in the. reverse directionto which thesegment is shiftable by the other shift-key, stops. for limiting thecase-shift movements of sa d shittable memher, and a movable deviceselectively movable in opposite directions different shittkeys arrangedto stop theshiftable member at either up or down shift thereof and atthe intermediate normal position of said shiftable member upon itsreturn from either of its said case-shift printing positions.

2. In a front-strike typewriting machine, in combination, anon-shittable platen, a set of shittable type-bars each swingalole tostrike the platen and having four. types thereon arranged in a row orseries longitudinally thereof, and means for shifting said set oftype-bars from a normal intermediate position in one direction through asingle caseshitt space or distance to a final case-shift position, or inthe other direction through a single case-shift space or distance to anintermediate case-shift position, or through two case-shitt spaces ordistances to another final case-shift position. 7

3. In a front-strike typewriting machine, in combination, anon-shittable platen, a set of shiftable type-bars each swingable tostrike the platen and having four types thereon arranged in a row orseries. longitudinally thereof, and means for shifting said set oftype-bars downwardly from a normal intermediate position for printingwiththe second type from the topin the series to a. final case-shiftposition to print with the first or uppermost type in the series, orupwardly from its normal positionrto an intermediate case-shift positionto print with the third type from the top in the series, or upwardlyfrom its normal position to another final case-shiftposition to printwith the lastor lowermost type in the series.

4. In a front-strike typewriting machine, in a combination, anon-shittable platen, a travel ng carriage therefor, an up-and-downshiftable type-bar segment capable of 0ccupying two finali positions andtwo intermediate positions, a set of type-bars pivoted on the segmenttoshift therewith and each having four types thereon arranged inwashifta-ble type-bar segment, a set of typebars pivoted on the segment toshift therewith. andieach havin four t. aes thereon ar-- ranged: in. arow or series longitudinally thereofi, a first shift-key torshifting thesegment from an intermediate normal position in one. direction through asingle caseshift: space or distance to a final case-shift position, asecond shift-key for shifting the se ment from its normal position inthe other direction through a single case-shift space or distance to anintermediate caseshiftposit-ion, a thirdshift-key for shifting thesegment from its normal position in the. same direction that it isshiftable by said? second shift-key through two caseshiftispaces ordistances to another final case-shift position, stops for the segmentfor-determining its final case-shift positons, and" movable stopscontrolled by the shift keys to determine the normal position and theintermediate. case-shift position of the segment. v

6: In a front-strike typewriting machine, in combination, anon-shiftable platen, a traveling carriage therefor, an up'-anddownshiftable type-bar segment, a set of typebars pivoted on the segment toshift there with and each having four types thereon arranged in a row orseries longitudinally thereof, a first shittdrey'forshiittihg thesegment downwardly from a normal intermediatev position for. printingwith the second type from the top in the series to a final case-shittposition toprint with the first or uppermost type in the series, asecond shiftkey for shifting the segment upwardly from its normalposition to an intermediate caseshift position to print with the thirdtype from the top in the series, a third shift-key for shifting thesegment upwardly from its normal position to another final case-shiftposition to print with the last or lowermost type in the series, stopsfor the segment for determining its final case-shift positions whenshifted by said first or by said third shift-key, a shift-key-controlled'movable stop to determine the intermediate caseshift position of thesegment, and shift-keycontrolled movable stops for stopping theSOQ-lflfifil? at its normal position upon its return from any of itscase-shift positions.

In a front-strike typewriting machine,

in combination, a non-shiftable platen, a traveling carriage therefor,an'up-and-down shiftable type-bar segment, a set of typebars pivoted onthe segment to shift therewith and each having four types thereonarranged in a row or series longitudinally thereof, a first shift-keyfor shifting the segment from an intermediate normal position in onedirection through a single case-shift space or distance to a finalcase-shift position, a second shift-key for shifting the segment fromits normal position in the other direction through a singlecase-shiftospace or distance to an intermediate case-shift position, athird shift-key for shifting the segment from its normal position in theother direction that it is shiftable by said second shift-key throughtwo case-shift spaces or distances to another final case-shift position,stops for the segment for determining its final case-shift positions,movable stops controlled by the shift-keys to determine the normalposition and the intermediate caseshift position of the segment, saidsegment when shifted upwardly being returnable by gravity to normalposition, and means for automatically lifting said segment to normalposition when shifted downwardly.

8. In a front-strike typewriting machine, in combination, anon-shiftable platen, a traveling carriage therefor, an up-and-downshiftable type-bar segment, a set of typebars pivoted on the segment toshift therewith and each having four types thereon arranged in a row orseries longitudinally thereof, a first shift-key for shifting the segment from an intermediate normal posit-ion in one direction through asingle case-shift space or distance to a final case-shift position, asecond shift-key for shifting the segment from its normal position inthe other direction through a single case-shift space or distance to anintermediate case-shiift position, a third shift-key for shifting thesegment from its normal position in the same direction that. it isshiftable by said second shift-key through two case-shift spaces ordistances to another final case-shift position, stops for the segmentfordetermining its final case-shift positions, movable stops controlled bythe shift-keys to determine the normal position and the intermediatecase-shift position of the segment, said segment when shifted upwardlybeing returnable by gravity to normal position a spring forautomatically lifting said segment to normal position when shifteddownwardly, and means to render the segmentlifting spring ineffective tofurther lift the segment when the lifted segment reaches its normalposition. 7

9. In a front-strike typewriting machine, in combination, innon-shiftable platen, a platen carriage therefor, an up-and-downshiftable type-bar segment, a setoftype ond type bars pivoted on thesegment to shift therewith and each having four types thereon arrangedin a row or series longitudinally thereof, a first shift-key forshifting the segment downwardly from a normal intermediate position forprinting with the second type from final case-shift position to printwith the first'or uppermost type in the series, a second shift-key forshifting the segment upwardly from its normal position to anintermediate case-shift position to print with the third type from thetop. in the series, a third shift-key for shifting the segment upwardlyfrom its normal position to another final case-shift position to printwith the last or lowermost type in the series, stops for the segment fordetermining its final case-shift positions when shifted'by said first orby said third shift-key, a shiftkeycontrolled movable stop to determinethe intermediate case-shift position of the segment,shift-key-controlled movable stops for stopping the segment at itsnormal position upon its return shift positions, said segment beingreturnable by gravity from its upper case-shift positions to its normalposition, and means for automatically returning said segment from itslower case-shift position to its normal position.

10. In a front-strike typewriting' machine, in combination, anon-shiftable platen, a platen carriage therefor, an up-and-downshiftable type-bar segment, a set of'typebars pivotedon the segment toshift therewith and each having four types thereon arranged in a row orseries longitudinally thereof, a first shift-key for shifting thesegment downwardly from a normal intermediate position for printing withthe seefrom the top in the series to a final case-shift position toprint with the first or uppermost type in the series, a second shift-keyfor shifting the segment upwardly from its normal position to anintermediate case-shift position to print with the third type from thetop in the series, a third shift-key for shifting the segment upwardlyfrom its normal position to another final-case-shift position to printwith the last or lowermost type'in the series, stops for the segment fordetermining its final case-shift positions when shifted by said first orby said third shift-key, a shiftkey-controlled movable stop to determinethe intermediate case-shift position of the segment,shift-key-oontrolled movable stops for stopping the segment atits normalposition upon its return from any of its caseshift positions, saidsegment being returnable by gravityfrom its upper case-shift the top inthe series to a from any of its case-' ositions to 1ts normal position,means including a segment-lifting spring for automatically returningsaid segment from its lower case-shift positionto its normalposition,and stop means including an abutment for rendering the segment-liftingspring ineffective to further lift the segment when the segment hasreached its normal position.

11. In a front-strike typewriting machine, in combination with a platen,an up-and down shiftable type-bar segment, a combined stop-device andnormally effective lockingdevice for stopping and holding the segment ata normal intermediateposition, a firstshiftdzey which when dcpressedfirst renders said locking-device ineffective and then shifts thesegment downwardly, a second shift-key which when depressed firstrenders said locking-device ineffective and then shifts the segmentupwardly, and a third shift-key which when depressed first renders saidlocking-device ineffective and then shifts the segment upwardly througha greater distance than it is shiftable by said second shift-key;

12. In a front-strike typewriting machine, in combination with a platen,an up-anddown shiftable type-bar segment, a combined stop-device andnormally effective lockingdevice for stopping and holding the segment atanormal intermediate position, a first shift-key-which when depressedfirst renders said locking-device ineffective and then shifts'thesegment downwardly to a final case-shift position, a second shift-keywhich when depressed first renders said locking-device ineffective andthen shifts the segment upwardly to an intermediate case-shift position,and a third shift-key which when depressed first renders saidlocking-device ineffective andthen shifts the segment upwardly to agreater extent than it is shiftable by said second shift-key and toa-final upper case-shift position, stops for determining the finalcase-shift positions of the segment, and a shift-key-contro-lled movablestop for determining the intermediate caseshift position of the segment.

13. In a front-strike typewriting machine, in combination with a platen,a type bar segment shiftable up and down from a normal intermediateposition to upper and lower case-shift positions and automaticallyreturnable from its case-shift positions to its normal position, acombined stop-device and normally effective lockingdevice for stoppingand holding the segment at its normal or intermediate position, saiddevice comprising upper and lower spaced and partly overlapping abutmentshoulders connected together to move as a unit, a pin or projection onthe segment to strike against said upper abutment shoulder for stoppingthe segment upon its return to normal position from lower case-shiftposition and striking against said lower abutment shoul der for stoppingthe segment upon its return to normal position from'upper caseshiftposition and to engage between the overlapping portions of said abutmentshoulders to lock the segment at normal position, a first shift-keywhich when depressed, first moves said device to enable the segment tobe shifted downwardly and then byfurther movement shifts the segmentdownwardly, a second shift-key which when depressed first moves saiddevice to enable the segment to be shifted upwardlv and then by furthermovement shifts the segment upwardly, and stops for determnr mg saidupper and lower case-shift positions of the segment.

14. In a front-st'ike four-type type-bar typewriting machine, incombination, a non-shiftable platen, an up-and-down shiftable type-barsegment, a combined stopdevice and locking-device for the segment, saiddevice comprising three abutment-forming stop shoulders connectedtogether to move as a unit, two of said shoul ders being overlapped inspaced relation and the third shoulder being at a different level fromsaid overlapped shoulders, apin or projection carried by the segment toengage between said overlapped shoulder for locking the segment at anormal interme diate position of the segment, said upper overlappedshoulder being engagcable by said pin to stop the segment upon itsreturn to normal position from a lower case shift position, and said.lower overlapped shoulder being engageable by said pin to stop thesegment upon its return from an upper case-shift position, and saidthird shoulder being engageable by said pin to stop the segment at anintermediate caseshift position, a first shift-key which when depressedfirst moves said device to cause one of said overlapped suouldcrs toclear said pin and then shifts the segment in one direction to a finalcase-shift position, a second shift-key, which when depressed firstmoves said device to cause said other over lapped shoulder to clear saidpin and then shifts the segment to an intermediate caseshift positionwith said pin against said third shoulder, a third-shift-key which whendepressed moves said device to cause one/of said overlapped shouldersand also said third shoulder to cl ar said pin and then shifts thesegment to a final case-shift position beyond its said intermediatecaseshift position, andstops for determining the final case-shiftpositions ofthe segment.

15. In a front-strike four-type type-bar typewriting machine, incombination, a nonshiftable platen, an up-and down shiftable type barsegment, a combined stop-de vice an d locking-device for the segment,said device comprising three abutment-forming stop shoulders connectedtogether to move as a unit, two of said shoulders being overlapped inspaced relation and the third t machine comprising a vmounted in themain therefrom, a type-bar segment carr ed by shoulder being at adifferent level from said overlapped shoulders, a pin or projectioncarried by the se ment to engage between said overlapped sio'ulders forlocking the segment at a normal intermediate position of the segment,said upper overlapped shoulder being engageable by said pin to stop thesegment upon its return to normal position from a lower easeshiftposition, and said lower overlapped shoulder being engageable by saidpin to stop the segment upon its return from an upper ease-shiftposition, and said third shoulder being engageable by said pin to stopthe segment at an intermediate case-shift position, a first shift-keywhich when depressed first moves said device to cause one of saidoverlapped shoulders to clear said pin and then shift the segment in onedirection to a final caseshift position, a second shift-key which whendepressed first moves said device to cause said other overlappedshoulder to clear said pin and then shifts the segment to anintermediate case-shiftposition with said pin against said thirdshoulder, a third shift-key which when depressed moves said device tocause one of said overlapped shoulders and also said third shoulder toclear said pin and then shifts the segment to a final case-shiftposition beyond its said intermediate case-shift position, and stop- 1shoulders on said device to stop the segment at its final case-shiftpositions.

16. A front-strike type-bar typewriting main frame, a platen, a platencarriage mounted to travel on the main frame, an escapement mechanismfor the carriage mounted on the main frame, a vibrating ribbon-guidemounted on the main frame, a subsidiary frame detachably mounted in themain frame for removal therefrom, a' type-action mounted on thesubsidary frame and comprising key-levers, an escapement-operatingdevice having a universal member operable by said keylevers, and mountedon the main frame, and a ribbon-guide-vibrating device mounted on themain frame and having a universal member operable by said key-levers,said key-levers being Withdrawn from said universal members byWithdrawing the subs sidary frame from the main frame.

17. A front-strike typewriting machine iaving, incombination, a mainframe, a platen, a platen carriage mounted to travel on the main frame,an escapement mechanism for the carriage mounted on the main frame, aribbon-vibrator mounted on the main frame, a subsidiary frame detachablyand. shiftable upon the subsidiary frame, a type-action mounted on thesubsidiary frame, and including type-bars pivoted on the segment toshift therewith and also inframe for removal eluding type-key-leverspivoted at their rear ends'and having portions extending downwardly fromtheir pivot point-s, an'esoapement-meohanism-operating by saiddownwardly-extending portions of the key-levers, and aribbon-vibrator-oper ating device actuable by said downwardlyextendingportions of the key-levers.

18; A front-strike"typewriting machine having, in combination, a mainframe, a platen, a platen carriage mounted to travel on the main frame,an escapement mechanism for the carriage mounted on the main frame, aribbon-vibrator mounted on the main frame, a removable subsidiary framedetachably mounted in the main frame, a type-bar segment carried by andshiftable upon the subsidiary frame, 'a type-action mounted on thesubsidiary frame, and including type-bars pivoted'on the segment toshift therewith, said type-action also includ ing type-key-levers, ashift-key-lever for shifting the segment mounted on the sub, sidiaryframe, a device for operating the escapement mechanism from thetype-action mounted on the main frame and disconnectible from thetype-action by the removal of the subsidiary frame from the main frame,and a device for vibrating the ribhon-vibrator from the type-actionmounted on the main frame and disconnectible from the type-action by theremoval of the subsidiary frame from the main frame.

19. A front-strike typewriting machine having, in combination, a mainframe, a nonshiftable platen, a platen carriage mounted to travel on themain frame, an escapement mechanism for the carriage mounted on the mainframe, a ribbon-vibrator mounted on the main frame, a subsidiary framedetaohably mounted in the main frame for removal through the bottomthereof, a shiftable type-bar segment mounted on the subsidiary frame, aset of type-bars pivoted on the segment to shift therewith. and eachhaving four types thereon, type-keys on the sub sidiary frame to operatethe type-bars, shiftkeys for the segment on the subsidiary frame, andmechanism for operating the escapement mechanism and the ribbonvibratorfrom the type-keys'and so arranged that removal of the'subsidiary framewill break the operative relation between the type-keys and theescapement mechanism and the ribbonvibrator, and such operative relationwill again be established upon replacing the subsidiary frame throughthe bottom of the machine.

20. A front-strike typewriting machine having, in combination, a mainframe, a nonshi'ftable platen, a platen carriage mounted to travel onthe main frame, an escapement mechanism for the carriage mounted on themain frame, a ribbon-vibrator mounted on the main frame, a removablesubsidiary device actuable loo frame detachably mounted in the mainframe, a type-bar segment shiftably mounted on the snbsidiaryframe andcapable of occupying vo final positions and two intermediate positions,a set of type-bars pivoted on the segment to shift therewith anol eachhaving four types thereon, type-keys on the subsidiary frame to operatethe type-bars, shift-keys on the subsidiary frame for shifting thesegment from normal position to any selected one of three caseshiftpositions, stops onthe subsidiary frame for determining the finalpositions of the segment, movable stops on the subsidiary framecontrolled by the shift-keys for determining the intermediate positionsof the segment, and mechanism operated by the type-keys for operatingthe escapement mechanism and the ribbon-vibrator.

21. A front-strike typewriting machine having, in combination, a mainframe, a non-shiftable platen, a platen carriage mounted to travel onthe main frame, an escapement mechanism for the carriage mounted on themain frame, a ribbon-vibrator mounted on the main frame, a re movablesubsidiary frame detachably mounted in the main frame, a type-bar seg-Vmcnt shifta-bly mounted on the subsidiary frame and capable ofoccupying two final positions and two intermediate positions, a set oftype-bars pivoted on the segmentto shift therewith and each having fourtypes thereon, type-keys on the subsidiary frame to operate thetype-bars, sl1ift-keys on the subsidiary frame for shifting the segmentfrom normal position to any selected one of three case-shift positions,stops on the subsidiary frame for determining the final positions of thesegment, movable stops on the subsidiary frame controlled by the shiftkeys for determining the intermediate positions of the segment, andmechanism on the main frame operated by the type-keys for operating theescapement mechanism and the ribbon-vibrator.

22.11] a typewriting machine, in combination, a main frame, a platen, aplatencarriage mounted to travel on said main frame, escapementmechanism for said carriage, a ribbon-vibrator mounted for verticalmovement on said main frame, a sub sidiary frame detachably connectedwith said main frame for removal therefrom, a type bar segment mountedfor vertical movement 011 said subsidiary frame, a type-bar guidemounted on said segment to project.upwardly immediately to the front ofthe ribbonyibrator, key-levers pivoted in said subsidiary frame, andkey-lcverctuable universal members for operating said escapementmechanism and said ribbon-vibrator,

respectively, the operative connection between sald keydevers and saiduniversal members being bicki by removal said subsidiary frame and beingreestablished by inserting the subsidiary frame into the main frame. 7 i

23. In a typewriting machine, a platen, a platen-marriage, a main frameon which said carriage travels, a set of type-bars, a type-U bar segmentin which said type-bars are pivoted, key-levers for actuating said typebars, and a subsidiary frame in which said segment and liey-lerers aremounted, said subsidiary frame comprising side members having uprightsadjacent the rear ends thereof, a crossmember connecting said up rights,and a key-lever pivot-rod beneath said cross-member. V

In a typewriting machine, a platen, a platen-carriage, a main frame onwhich said carriage travels, a set of type-bars, a type bar segment inwhich said typebars are pivoted, key-levers for actuating said typebars, and a subsidiary frame in which said segment and key levers aremounted, said subsidiary frame comprising side members having 7 uprightsadjacent the rear ends thereof, a cross-member connecting said up-'rights, a key-lever pivot-rod beneath said cross-member, and across-member joining said side members at the lower rear portion of theframe.

In a typewriting machine, a platen, a platen-carriage, a main frame onwhich said carriage travels, a set of type-bars, a type-bar segment inwhich said type-bars are pivoted, key-levers for actuating saidtypebars, and a subsidiary frame in which 'said segment and key-leversare mounted,

said subsidiary frame comprising side membors having uprights adjacentthe rear ends thereof, a cross-member connecting said up rights, a lre-lever pivot-rod beneath said cross-member, a cross-member joining saidside members at the lower rear portion of the frame, and a key-lever comb joining said side -members at their forward ends and having its teeth.extending downwardly.

26. In a typewriting machine, a platen,v

a platen-carriage, a main frame on which said carriage travels, a set oftype-bars, a type-bar segment in which said typebars are pivoted,key-levers for actuating said type-bars, and a subsidiary frame in whichsaid segment and key-levers are mounted, said subsidiary framecomprising side members ha ing uprights adjacent the rear ends thereof,a cross-member connecting said up rights, a keydever pivot-rod beneathsaid cross-member, a cross-member joining said side members at the lowerrear portion of the frame, a key-lever comb joining said side members attheir forward ends and having its teeth extending downwardly, and across-memberjoining the side members at their lower edges and near theirfront ends.

BFJRNHAM STIGKIFIEYZ

